Cooktop user interface



FIG. 1 is a top view of a cooktop incorporating a cooktop user interface, embodying the new ornamental design;

FIG. 2 is a front perspective view of the disclaimed cooktop incorporating the cooktop user interface shown in FIG. 1, embodying the new ornamental design; and,

FIG. 3 is a top view of the cooktop user interface shown in FIG. 1, embodying the new ornamental design.

The dashed lines in FIGS. 1-2 illustrate features that form no part of the claimed design. 

CLAIM The ornamental design for a cooktop user interface, as shown and described. 